/**
 *
 *    geo-platform
 *    Rich webgis framework
 *    http://geo-platform.org
 *   ====================================================================
 *
 *   Copyright (C) 2008-2021 geoSDI Group (CNR IMAA - Potenza - ITALY).
 *
 *   This program is free software: you can redistribute it and/or modify it
 *   under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version. This program is distributed in the
 *   hope that it will be useful, but WITHOUT ANY WARRANTY; without
 *   even the implied warranty of MERCHANTABILITY or FITNESS FOR
 *   A PARTICULAR PURPOSE. See the GNU General Public License
 *   for more details. You should have received a copy of the GNU General
 *   Public License along with this program. If not, see http://www.gnu.org/licenses/
 *
 *   ====================================================================
 *
 *   Linking this library statically or dynamically with other modules is
 *   making a combined work based on this library. Thus, the terms and
 *   conditions of the GNU General Public License cover the whole combination.
 *
 *   As a special exception, the copyright holders of this library give you permission
 *   to link this library with independent modules to produce an executable, regardless
 *   of the license terms of these independent modules, and to copy and distribute
 *   the resulting executable under terms of your choice, provided that you also meet,
 *   for each linked independent module, the terms and conditions of the license of
 *   that module. An independent module is a module which is not derived from or
 *   based on this library. If you modify this library, you may extend this exception
 *   to your version of the library, but you are not obligated to do so. If you do not
 *   wish to do so, delete this exception statement from your version.
 */
package org.geosdi.geoplatform.experimental.el.configurator;

import org.geosdi.geoplatform.experimental.el.index.GPIndexCreator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.List;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicBoolean;

import static java.util.Collections.sort;
import static org.springframework.core.annotation.AnnotationAwareOrderComparator.INSTANCE;

/**
 * @author Giuseppe La Scaleia - CNR IMAA geoSDI Group
 * @email giuseppe.lascaleia@geosdi.org
 */
public class GPBaseIndexConfigurator implements GPIndexConfigurator {

    private static final Logger logger = LoggerFactory.getLogger(GPBaseIndexConfigurator.class);
    //
    private final AtomicBoolean configured = new AtomicBoolean(false);
    @Autowired
    private List<GPIndexCreator> indexCreators;

    /**
     * @throws Exception
     */
    @Override
    public final void configure() throws Exception {
        if (configured.compareAndSet(false, true)) {
            this.indexCreators.stream()
                    .filter(Objects::nonNull)
                    .forEach(ic -> {
                        try {
                            ic.createIndex();
                        } catch (Exception ex) {
                            ex.printStackTrace();
                            logger.error("#################INDEX_CREATION_ERROR : {}\n", ex.getMessage());
                        }
                    });
//            fromArray(this.indexCreators.stream().toArray(GPIndexCreator[]::new))
//                    .filter(Objects::nonNull)
//                    .observeOn(computation())
//                    .subscribe(ic -> ic.createIndex(), ex -> logger.error("###################{}\n", ex.getMessage()));
        }
    }

    @Override
    public final boolean isConfigured() {
        return this.configured.get();
    }

    @Override
    public final void order() {
        sort(indexCreators, INSTANCE);
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + " {"
                + "indexCreators = " + indexCreators
                + ", configured = " + configured + '}';
    }
}